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INTELLIMETER® REGISTER™
MODEL RG2
INSTALLATION AND CONNECTIONS
INSTALLATION MANUAL
WARNING: Any work on or near energized metering equipment can present
a danger of electrical shock. All work on these products should be
performed only by qualified industrial electricians and metering specialists in
accordance with local utility safety practices and procedures outlined in the
Handbook for Electricity Metering (available from the Edison Electric
Institute, 1111 19th St. NW, Washington, DC 20036). The Information
contained within this book is intended to be an aid to qualified metering
personnel. It is not intended to replace the extensive training necessary to
install or remove meters from service.
Document A-7004-45 Rev.- F
Drawing B902-445 Rev.- D
July 30, 2003
osc/INTELLIMETER
1051 SERPENTINE LANE, STE. 400
Phone (925) 485-9490
www.osc-intellimeter.com
PLEASANTON, CA 94566
Fax (925) 485-9537
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A-7004-45 Rev.- F
INTRODUCTION
The Intellimeter Registers are CT- based, universal meters suitable for new buildings or
retrofit projects in existing buildings. Their design makes installation simple. No meter sockets
or additional hardware is needed. No expensive rewiring, is required either. Simply install a
Register wherever you want to meter loads.
Register models are available for conventional 5 Amp output current transformers or low
cost 0.1 amp output current transformers, including split-core types. Using split-core current
transformers, the Register can be installed without disturbing existing wiring.
The standard version of the Intellimeter Register measures kilowatthour consumption.
It is available with a demand metering option as well. The demand meter is available for
different demand intervals, with the standard demand interval in any geographical area
determined by local rate structures. A cumulative demand register is standard on
Registers equipped for demand metering. Any authorized or unauthorized reset of the
demand meter will register in the cumulative demand register, preserving the demand
reading.
If the Register is not installed properly or needs service, it displays a help code. It includes
an “88888888” display that cycles with the dial displays so the user can always verify that
the liquid crystal display is functioning properly. The Register also has displays to enable a
trained meter tester to conduct accuracy tests in the field. These consist of blinking
indicators, a horizontal bar and a vertical bar that will be displayed in the far left position of
the display. There is also a blinking dot just to the right of the display number any time the
meter is accumulating energy.
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The Register is compatible with the Intellimeter system, used for remote meter reading. Should
the number of loads metered make it desirable to use a remote reading metering system, the
pulse output on the Register allows you to interface the meter with an Intellimeter Pulse Monitor
for remote reading capabilities.
The pulse output of the Register is Standard KYZ, Form C output. It is compatible with most
energy management systems which may be used with the Register for remote meter reading
and load control. It is also compatible with pulse recording devices commonly used by electric
utility companies for remote billing and load research.
INSTALLATION
Inspect installation site. Working clearances should comply with the national Electric Code
(NEC), Article 110-16. If not, take corrective action. The Register is intended for indoor use
only. Do not install in damp or wet locations without proper enclosure.
Inspect the switchgear panel. Wire bending space should be in compliance with NEC
Article 373-6. Verify that current transformers, voltage taps and wiring devices can be
installed without crowding the subpanel. If adequate space is not available, an exterior current
transformer cabinet will be required.
Identify the source of power. Trace wiring back to transformer or the service entrance if the
service is not known.
5 Amp
0.1 Amp
Secondary CT
Secondary CT
Electrical Service
Register Type
Register Type
120V 2 Wire single-phase
RG2-120.1
RG2-120
3 Wire High Voltage using Voltage Transformers
RG2-120.1
RG2-120
120/208V 3 Wire Network
RG2-208.1
RG2-208
208V 3 Wire ungrounded or 120/208V 4 Wire Wye
RG2-208.1
RG2-208
120/240V 3 Wire single-phase
RG2-240.1
RG2-240
240V 2 Wire Delta
RG2-240.1
RG2-240
240V 3 Wire Delta
RG2-240.1
RG2-240
240V 4 Wire Delta
RG2-240.1
RG2-240
480V 3 Wire Delta or 277/480V 4 Wire Wye
RG2-480.1
RG2-480
600V 3 Wire Delta or 346/600V 4 Wire Wye
RG2-600.1
RG2-600
Verify that you have the correct type of Intellimeter Register for the application.
Warning: If the equipment described is modified or used in any manner
not specified by these instructions the protection provided by the equipment may be impaired.
Inspect the Register electronic assembly for the correct type number on the label and
for signs of damage during shipping and handling. See Figure 3 for electronics assembly
layout.
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Mount the Register enclosure. See Figures 2 and 3. The 10 inch side of the enclosure must
be vertical so the dial display can be read after installation.
Knockouts are provided for 3/4 inch trade size
metal conduit. Reliable grounding is required.
Note: Equipment grounding must be done
in accordance with local and national codes
of the authority having jurisdiction. The
protective earth terminal is provided for this
function.
Attach the enclosure to a wall stud using
screws or provide equivalent support.
Pull leads from the load to be metered to the Register. Color code or label all leads.
Provide voltage disconnect and CT shorting means if required.
EXAMPLES
•
3 Wire Network: pull 2 voltage taps, 1 neutral, 2 leads for CT-1 and 2 leads
for CT-2; 7 leads total.
•
4 Wire Wye: pull 3 voltage taps, 1 neutral 2 leads for CT-1, 2 leads for
CT-2 and 2 leads for CT-3; 10 leads total.
•
3 Wire Delta: pull 3 voltage taps, 2 leads for CT-1 and 2 leads for CT-2;
7 leads total.
•
4 Wire Delta, pull 3 voltage taps, 1 neutral, 2 leads for CT-1, 2 leads for
CT-2 and 2 leads for CT-3; 10 leads total.
•
If pulse output is used, pull three leads from the pulse recording device to the Register
enclosure.
Mount the Register electronics assembly. Align the holes in the printed circuit board
with the standoffs provided in the enclosure. Push the printed circuit board onto the
standoffs until it snaps in place. Refer to Figure 14 for additional instructions.
Connect the leads to the input Connectors, following the appropriate wiring diagram exactly. Plug connectors into headers on board. If the pulse output is used plug in
and wire connector PL1 on the upper left side of the electronics assembly.
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See Figure 4 for 2 Wire grounded single-phase
connections.
See Figure 5 for 2 Wire ungrounded single-phase
connections.
See Figure 6 for 3 Wire Network and 3 Wire
single-phase 120/240V.
See Figure 7 for 3 Wire Delta connections.
See Figure 8 for 4 Wire Delta and Wye connections.
See Figure 9 for High Voltage 3 Wire (without
grounded neutral) connections. Note if the service is
4 wire wye, any loads connected to neutral or ground
will cause meter errors.
See Figure 10 for High Voltage 4 Wire connections.
WARNING: IN METERING APPLICATIONS WITHOUT A
GROUNDED NEUTRAL, CURRENT TRANSFORMERS AND
THE ELECTRONICS ASSEMBLY COULD BE AT A VOLTAGE
ABOVE GROUND. TO AVOID ELECTRIC SHOCK, DO NOT
ENERGIZE THE VOLTAGE LEADS UNTIL ALL CONNECTIONS
ARE MADE AND THE COVER IS INSTALLED.
Calculate the kilowatt-hour multiplier and mark it on the Register nameplate label.
Use a permanent marker. Determine the marked ratio of the current transformers that will be
installed. The marked ratio of the current in the primary (metered load) that will produce rated
secondary amps in the circuit attached to the current transformer (the meter). Divide the primary
current by 100 to determine the multiplier. (See following).
Current Transformer
Marked Ratio
100:5 or 100:0.1
200:5 or 200:0.1
400:5 or 400:0.1
800:5 or 800:0.1
1000:5 or 1000:0.1
1500:5 or 1500:0.1
2000:5 or 2000:0.1
Multiplier
1
2
4
8
10
15
20
Disconnect power to the metered load. Turn off all breakers in the cabinet to be metered.
Install current transformers. See Figure 11 for examples. See Figure 4 through 10 for
connections.
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SPECIFICATIONS
Voltage:
Nominal ±10%, 50/60Hz, 7 watts
Nominal (Line-To-Line) 120, 208, 240, 480, 600
Installation Overvoltage Category III
Polution Degree 2
Power Factor:
Accurate at any
Temperature:
-20°C to +50°C
Altitude:
Up to 2,000m
Humidity:
Maximum relative humidity 80% for temperatures up to
31°C decreasing linearity to 50% relative humidity at 40°C
Accuracy:
Exceeds ANSI C12.16
Memory:
Nonvolatile EE PROM
Burdens:
Voltage:
Current:
7VA maximum on L1-L2 for instrument power
otherwise 0.22VA maximum per phase.
0.25VA maximum per phase.
Approvals:
UL/CUL to 3111, FCC Part 15 Class B
Enclosure:
8”W x 10”H x 3”D
CurrentTransformers:
Transformers:
Any 5 amp secondary output CT (class 10 meter)
RG2-XXX.1 (Any 0.1 Amp output CT)
Pulse Output:
Form C or form A contacts rated at 0.1amp 240Vac
Readout:
LCD (backlighted), six digit dials
Cleaning:
The meters are not suitable for hose down cleaning. Use only a damp
cloth to remove dust or dirt from the outside of the enclosure.
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Note the polarity mark on the current transformer, usually a white dot or “H1”. The polarity
mark must be toward the line or source of power when the current transformer is installed.
The polarity (plus) output of the current transformer is indicated by a white dot or “X1”
marked by one of the secondary terminals. OSI split core, 0.1A secondary, transformers
have a BLACK/YELLOW polarity (plus) lead and for 5 amp secondary transformers the
WHITE lead is polarity (plus).
Larger current transformers are usually provided with integral shunts between the secondary
terminals. The shunt, if provided, should remain in place until installation of the current
transformer is complete.
If split core current transformers are being used, disassemble each current transformer and
reassemble it around the feeder with the polarity mark on the line side of the current
transformers. If more than one polarity mark is provided on the current transformer, both
should be on the line side when it is assembled on the line.
WARNING: Split-Core Current Transformers can be installed on a feeder
that is conducting current. If the secondary terminals are not shunted or
already connected to the meter, a high voltage will develop across the
secondary terminals, possibly providing a lethal shock and/or damaging
the current transformer.*
* OSC/Intellimeter 0.1 Amp secondary CTs have over voltage protection built-in which allows
the secondary to be open circuited safely.
If solid-core window type current transformers are used, remove each feeder from its lug and
place a current transformer on the feeder with the polarity mark on the line side of the current
transformer. When metering critical loads that cannot be shut down, provision of a means
to short circuit CT secondary leads before disconnecting them from the Register is
recommended to facilitate testing and service. Secure current transformers to feeders with
wire ties or equivalent support.
If a direct voltage tap is to be used, connect taps on the line side of the current
transformer on each line. Provision of a means to disconnect the meter from voltage
taps is recommended to facilitate testing and service.
See figures 4 through 10 for connections. Use minimum 14 AWG wire for the voltage tap.
Voltage taps and current transformers in corresponding positions must be on the same
electrical phase for proper operation of the Register. For example, if the Line 1 voltage tap
was connected to A-Phase, then CT-1 must be on the A-Phase feeder.
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Connect the voltage taps to the feeders with the ILSCO Connector No. IPC-4/0-6 or equivalent.
Torque the connector as specified by the manufacturer, (13 foot-pounds for ILSCO Connector
No. IPC-4/0-6 using a torque wrench. Equivalent connections include direct connection to bus
bars, split bolt connectors, and other means of permanent connection acceptable to local
authorities.
If voltage taps will exceed 10 feet, overcurrent protection is required for the conductors where
the voltage taps are connected to the line.
Alternate connections can be made if it is impractical to make voltage taps directly to
the feeder on the line side of the current transformers. For example when the meter
voltage tap is made at the circuit breaker panel. See Figure 12 for an example.
Connect the voltage tap on the load side of
the current transformer.
Route the free end of the voltage tap
through the current transformer from the
load side to the line side.
If AC Neutral is used (Network, Wye or 4
Wire Delta), connect neutral to the neutral
buss.
Use wire ties to bundle the wiring harness
and route it away from the other conductors
in the cabinet. Also bundle wiring harness
in the Intellimeter Register enclosure with
wire ties.
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Secure covers on the switchgear cabinet and the Intellimeter Register. If the Register
cover is equipped with Demand Reset Switch, connect the switch to the S1 terminals located
at the top left corner of the main printed circuit board of the Register electronics assembly. See
Figure 3 for location of the S1 terminals.
WARNING: TO AVOID ELECTRIC SHOCK, DISCONNECT POWER TO THE
REGISTER BEFORE CONNECTING THE DEMAND RESET SWITCH.
Seal the cover on the Intellimeter Register with a pair of lead-wire seals, if desired.
See Figure 13. Two of the screws supplied with the Register have horizontal holes through
the head of the screw. Two corners of the cover have holes to accept the wire from a lead wire
seal. Match screws to corners for sealing. Place wires through holes in enclosure. Tighten
screws securely. Run lead through hole in screw and crimp to other lead as close to screw as
possible. Repeat for second screw.
Connect power to load. Turn on Circuit breakers.
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MAINTENANCE
Routine Maintenance: There are no required maintenance operations for the Intellimeter
Register. However, qualified personnel may wish to perform an annual inspection of wiring
connections. It is advisable to check for help messages every time the meter is read. If the
Register is integrated into a remote reading system with the pulse output a periodic check for
help messages is advisable.
Repairs: It is not recommended that the field personnel replace any of the Register’s internal
components, including fuses. If it is necessary to replace an Intellimeter Register, qualified
personnel should follow the procedure below:
Have replacement board available before starting procedure. Disconnect power from the
metered load and the register.
WARNING: If the metered electrical service is ungrounded, current
transformers and electronics could be at a voltage above ground until the
voltage taps are disconnected. Do not touch current transformer leads or any
part of the electronics assembly until the voltage leads have been
disconnected from power.
Remove the cover from the Intellimeter Register. Short circuit the secondary of each current
transformer. Unplug the 4 position and 6 position connectors.
WARNING: If the current transformer secondaries are left open circuited and
current is supplied to the primary, a high voltage will develop between the
secondary terminals of the transformer. To avoid electric shock and the possibility of damage to the current transformer, be sure the secondaries are
shorted together on each current transformer.*
* OSC/Intellimeter 0.1 Amp secondary CTs have over voltage protection built-in which allows
the secondary to be open circuited safely.
Disconnect the KYZ leads from the pulse output board, if provided. Insulate the ends of the
leads.
Replace the Register electronics assembly (refer to installation instructions on page 4).
Return the electronics assembly to the dealer or distributor from whom it was purchased for
replacement.
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ELECTRONICS ASSEMBLY
PCB MOUNTING
NYLON STANDOFFS
PCB
MOUNTING HOLES
ENCL
MOUNTING
HOLES
STEEL STANDOFF
FOR PCB
AND SEM SCREW
STEP 1: INSTALL PRINTED CIRCUIT BOARD IN ENCLOSURE BY
LINING UP NYLON STANDOFFS WITH BOARD MOUNTING
HOLES IN THE DIRECTION SHOWN ABOVE AND PRESSING
BOARD DOWN ONTO NYLON STANDOFFS UNTIL THEY LOCK.
STEP 2: INSTALL SEM SCREW PROVIDED
AS INDICATED IN LOWER LEFT CORNER
MOUNTING POSITION
FIGURE 14
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